12113861 has 2 divisors, whose sum is σ = 12113862. Its totient is φ = 12113860.

The previous prime is 12113833. The next prime is 12113863. The reversal of 12113861 is 16831121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8236900 + 3876961 = 2870^2 + 1969^2 .

It is an emirp because it is prime and its reverse (16831121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12113861 - 2⁶ = 12113797 is a prime.

Together with 12113863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12113863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056930 + 6056931.

It is an arithmetic number, because the mean of its divisors is an integer number (6056931).

Almost surely, 2^12113861 is an apocalyptic number.

It is an amenable number.

12113861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12113861 is an equidigital number, since it uses as much as digits as its factorization.

12113861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 12113861 is about 3480.4972345916. The cubic root of 12113861 is about 229.6646720275.

Adding to 12113861 its reverse (16831121), we get a palindrome (28944982).

The spelling of 12113861 in words is "twelve million, one hundred thirteen thousand, eight hundred sixty-one".